'Useful' in the Bible

For David, after having been useful to his own generation in accordance with God's purpose, did fall asleep, was gathered to his forefathers, and did undergo decay.

Train yourself in godliness. Exercise for the body is not useless, but godliness is useful in every respect, possessing, as it does, the promise of Life now and of the Life which is soon coming.

Every Scripture is inspired by God and is useful for teaching, for convincing, for correction of error, and for instruction in right doing;

This is a faithful saying, and on these various points I would have you insist strenuously, in order that those who have their faith fixed on God may be careful to set an example of good actions. For these are not only good in themselves, but are also useful to mankind.

For land which has drunk in the rain that often falls upon it, and brings forth vegetation useful to those for whose sakes, indeed, it is tilled, has a share in God's blessing.