Psalms 90:10

The days of our years [are] threescore years and ten; and if by reason of strength [they be] fourscore years, yet [is] their strength labour and sorrow; for it is soon cut off, and we fly away.

Ver. 10. The days of our years are threescore, &c.] So Solon in Laertius saith, the term of man's life is seventy years, this few exceed, and fewer attain to. To the same sense speaketh Macrobius also (Lib. 1., Som. cap. 6), saying, Septies deni anni a Physicis creditur meta vivendi, et hoc vitae humanae perfectum spacium terminatur, &c. The Fathers lived longer; but as men's wickedness increased, so their days decreased; and now their lives are daily shortened, the generations despatch away, that the world may the sooner come to an end. If Moses and Aaron of old, and Iohannes de temporibus, and some few others of latter time, live longer, even to a hundred or more, these are singular examples, and it is of the generality that the psalmist here speaketh.

And if by reason of strength, &c.] One readeth it thus; And if by fortitude fourscore years, even their latitude is labour and sorrow; that is, this enlarging of the time bringeth nothing but labour and misery, because now the body is diseased (Dr Major).

For it is soon cut off] As a web, or as grass.

And we fly away] As a bird upon the wing, or as an hour of the day.

Qui nescit quo vita modo volat, audiat horas;

Quam sit vita fugax, nos docet iste sonus.

I am not eternity, said Epictetus, but a man; that is, a small part of the whole, as the hour is of the day; I must therefore come and go away as the hour doth (Enchirid.).