'It's' in the Bible

So I hated life, because whatever is done on earth causes me trouble it's all pointless, like chasing after the wind.

It's better to have one handful of tranquility than to have two handfuls of trouble and to chase after the wind.

it's better that you don't promise than that you do promise and not follow through.

It's better to attend a funeral than to attend a banquet, for everyone dies eventually, and the living will take this to heart.

Indeed, wisdom gives protection, just like money does, but it's better to know that wisdom gives life, to those who have mastered it.

Whatever it is, it's far off and most profound. Who can attain it?