Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?

And seeing a fig tree afar off having leaves, he came, if haply he might find any thing thereon: and when he came to it, he found nothing but leaves; for the time of figs was not yet.

For every tree is known by his own fruit. For of thorns men do not gather figs, nor of a bramble bush gather they grapes.

Can the fig tree, my brethren, bear olive berries? either a vine, figs? so can no fountain both yield salt water and fresh.