'Enough' in the Bible

And those on the rock [are those] who receive the word with joy when they hear [it], and these do not have [enough] root, who believe for a time and in a time of testing fall away.

For which of you, wanting to build a tower, does not first sit down [and] calculate the cost [to see] if he has [enough] {to complete it}?

And the manager said to himself, 'What should I do, because my master is taking away the management from me? I am not strong enough to dig; I am ashamed to beg.