'Soul' in the Bible

There is nothing good for man, but 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.

There is one alone and without a second; also he hath neither son nor brother: yet is there no end of all his labour, neither is his eye satisfied with riches, and he saith not, For whom then am I labouring, and depriving my soul of good? This also is vanity and a grievous occupation.

one to whom God giveth riches, wealth, and honour, and he wanteth nothing for his soul of all that he desireth, yet God giveth him not power to eat thereof, but a stranger eateth it: this is vanity, and a sore evil.

If a man beget a hundred sons, and live many years, so that the days of his years be many, but his soul be not filled with good, and also he have no burial, I say an untimely birth is better than he.

which my soul yet seeketh, and I have not found: one man among a thousand have I found, but a woman among all those have I not found.