Therefore I went about to cause my heart to despair of all the labour which I took under the sun. For there is a man whose labour is in wisdom, and in knowledge, and in equity; yet to a man that hath not laboured therein shall he leave it for his portion. This also is vanity and a great evil. For what hath man of all his labour, and of the vexation of his heart, wherein he hath laboured under the sun? For all his days are sorrows, and his travail grief; yea, his heart taketh not rest in the night. This is also vanity. There is nothing better for a man, than that he should eat and drink, and that he should make his soul enjoy good in his labour. This also I saw, that it was from the hand of God. For who can eat, or who else can hasten hereunto, more than I? For God giveth to a man that is good in his sight wisdom, and knowledge, and joy: but to the sinner he giveth travail, to gather and to heap up, that he may give to him that is good before God. This also is vanity and vexation of spirit. Ecclesiastes 2:20-26 King James Version

For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope. So teach us to number our days, that we may apply our hearts unto wisdom. For I rejoiced greatly, when the brethren came and testified of the truth that is in thee, even as thou walkest in the truth. Romans 15:4,Psalm 90:12 & 3 John 3 King James Version

There is no remembrance of former things; neither shall there be any remembrance of things that are to come with those that shall come after. Ecclesiastes 1:11 King James Version

I said in mine heart, Go to now, I will prove thee with mirth, therefore enjoy pleasure: and, behold, this also is vanity. I said of laughter, It is mad: and of mirth, What doeth it? I sought in mine heart to give myself unto wine, yet acquainting mine heart with wisdom; and to lay hold on folly, till I might see what was that good for the sons of men, which they should do under the heaven all the days of their life. I made me great works; I builded me houses; I planted me vineyards: I made me gardens and orchards, and I planted trees in them of all kind of fruits: I made me pools of water, to water therewith the wood that bringeth forth trees: I got me servants and maidens, and had servants born in my house; also I had great possessions of great and small cattle above all that were in Jerusalem before me: I gathered me also silver and gold, and the peculiar treasure of kings and of the provinces: I gat me men singers and women singers, and the delights of the sons of men, as musical instruments, and that of all sorts. So I was great, and increased more than all that were before me in Jerusalem: also my wisdom remained with me. And whatsoever mine eyes desired I kept not from them, I withheld not my heart from any joy; for my heart rejoiced in all my labour: and this was my portion of all my labour. Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do: and, behold, all was vanity and vexation of spirit, and there was no profit under the sun. And I turned myself to behold wisdom, and madness, and folly: for what can the man do that cometh after the king? even that which hath been already done. Then I saw that wisdom excelleth folly, as far as light excelleth darkness. The wise man's eyes are in his head; but the fool walketh in darkness: and I myself perceived also that one event happeneth to them all. Then said I in my heart, As it happeneth to the fool, so it happeneth even to me; and why was I then more wise? Then I said in my heart, that this also is vanity. For there is no remembrance of the wise more than of the fool for ever; seeing that which now is in the days to come shall all be forgotten. And how dieth the wise man? as the fool. Therefore I hated life; because the work that is wrought under the sun is grievous unto me: for all is vanity and vexation of spirit. Yea, I hated all my labour which I had taken under the sun: because I should leave it unto the man that shall be after me. And who knoweth whether he shall be a wise man or a fool? yet shall he have rule over all my labour wherein I have laboured, and wherein I have shewed myself wise under the sun. This is also vanity. Therefore I went about to cause my heart to despair of all the labour which I took under the sun. Ecclesiastes 2:1-20 King James Version

If there be therefore any consolation in Christ, if any comfort of love, if any fellowship of the Spirit, if any bowels and mercies, Fulfil ye my joy, that ye be likeminded, having the same love, being of one accord, of one mind. Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves. Look not every man on his own things, but every man also on the things of others. Let this mind be in you, which was also in Christ Jesus: Who, being in the form of God, thought it not robbery to be equal with God: But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men: And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross. Wherefore God also hath highly exalted him, and given him a name which is above every name: That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father. Wherefore, my beloved, as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling. For it is God which worketh in you both to will and to do of his good pleasure. Do all things without murmurings and disputings: That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world; Holding forth the word of life; that I may rejoice in the day of Christ, that I have not run in vain, neither laboured in vain. Yea, and if I be offered upon the sacrifice and service of your faith, I joy, and rejoice with you all. For the same cause also do ye joy, and rejoice with me. Philippians 2:1-18 King James Version