fruit
bear fruit have good results.
☞ This expression is a biblical metaphor, found, for example, in Matthew 13:23: 'But he that received seed into the good ground is he that heareth the word, and understandeth it; which also beareth fruit, and bringeth forth, some an hundredfold, some sixty, some thirty'.
forbidden fruit: seeforbidden.
low-hanging fruit: seelow.