Cross reference
1 Corinthians 15:36
36 You foolish one, that which you yourself sow is not made alive unless it dies.
John 12:24
24 Most assuredly I tell you, unless a grain of wheat falls into the earth and dies, it remains by itself alone. But if it dies, it bears much fruit.
Luke 11:40
40 You foolish ones, didn't he who made the outside make the inside also?
Luke 12:20
20 "But God said to him, 'You foolish one, tonight your soul is required of you. The things which you have prepared--whose will they be?'
Luke 24:25
25 He said to them, "Foolish men, and slow of heart to believe in all that the prophets have spoken!
Romans 1:22
22 Professing themselves to be wise, they became fools,
Ephesians 5:15
15 Therefore watch carefully how you walk, not as unwise, but as wise;