I love Ecclesiastes. Lately, I've been going back to the words of the Preacher therein to put things into perspective. Especially Ecclesiastes 2:18-25 (English Standard Version, or ESV):
"[18] I hated all my toil in which I toil under the sun, seeing that I must leave it to the man who will come after me, [19] and who knows whether he will be wise or a fool? Yet he will be master of all for which I toiled and used my wisdom under the sun. This also is vanity. [20] So I turned about and gave my heart up to despair over all the toil of my labors under the sun, [21] because sometimes a person who has toiled with wisdom and knowledge and skill must leave everything to be enjoyed by someone who did not toil for it. This also is vanity and a great evil. [22] What has a man from all the toil and striving of heart with which he toils beneath the sun? [23] For all his days are full of sorrow, and his work is a vexation. Even in the night his heart does not rest. This also is vanity.
[24] There is nothing better for a person than that he should eat and drink and find enjoyment in his toil. This also, I saw, is from the hand of God, [25] for apart from him who can eat or who can have enjoyment?"