Verse 4

His breath goeth forth, he returneth to his earth; in that very day his thoughts perish.

That day — As soon as ever he is dead.

Thoughts — All his designs and endeavours either for himself or for others.

Verse 6

Which made heaven, and earth, the sea, and all that therein is: which keepeth truth for ever:

For ever — Both because he liveth for ever to fulfil his promises, and because he is eternally faithful.