'Soul' in the Bible

There is nothing better for a man than that he should eat and drink, and make his soul enjoy good in his labor. This also I saw, that it is from the hand of God.

There is one that is alone, and he hath not a second; yea, he hath neither son nor brother; yet is there no end of all his labor, neither are his eyes satisfied with riches. For whom then,'saith he , do I labor, and deprive my soul of good? This also is vanity, yea, it is a sore travail.

a man to whom God giveth riches, wealth, and honor, so that he lacketh nothing for his soul of all that he desireth, yet God giveth him not power to eat thereof, but an alien eateth it; this is vanity, and it is an evil disease.

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

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