Commentaries:
Robertson's Word Pictures (NT)
Is known (ginwsketai). The fruit of each tree reveals its actual character. It is the final test. This sentence is not in Matthew 7:17-20, but the same idea is in the repeated saying (Matthew 7:16, Matthew 7:20): "By their fruits ye shall know them," where the verb epignwsesqe means full knowledge. The question in Matthew 7:16 is put here in positive declarative form. The verb is in the plural for "men" or "people," sullegousin. See on Matthew 7:16.
Bramble bush (batou). Old word, quoted from the LXX in Mark 12:26; Luke 20:37 (from Exodus 3:6) about the burning bush that Moses saw, and by Stephen (Acts 7:30, Acts 7:35) referring to the same incident. Nowhere else in the N.T. "Galen has a chapter on its medicinal uses, and the medical writings abound in prescriptions of which it is an ingredient" (Vincent).
Gather (trugwsin). A verb common in Greek writers for gathering ripe fruit. In the N.T. only here and Revelation 14:18 f.
Grapes (stafulhn). Cluster of grapes.
Other Robertson's Word Pictures (NT) entries containing Luke 6:44:
Luke 16:6
Revelation 14:18
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