Cross reference
1 Corinthians 15:36
36 Foolish man, it is necessary for the seed which you put into the earth to undergo death in order that it may come to life again:
John 12:24
24 Truly I say to you, If a seed of grain does not go into the earth and come to an end, it is still a seed and no more; but through its death it gives much fruit.
Luke 11:40
40 O you foolish ones! did not he who made the outside in the same way make the inside?
Luke 12:20
20 But God said to him, You foolish one, tonight I will take your soul from you, and who then will be the owner of all the things which you have got together?
Luke 24:25
25 And he said, O foolish men! how slow you are to give belief to what the prophets have said.
Romans 1:22
22 Seeming to be wise, they were in fact foolish,
Ephesians 5:15
15 Take care then how you are living, not as unwise, but as wise;