New Living Translation
Stop deceiving yourselves. If you think you are wise by this world’s standards, you need to become a fool to be truly wise.

American Standard Version
Let no man deceive himself. If any man thinketh that he is wise among you in this world, let him become a fool, that he may become wise.

Berean Study Bible
Let no one deceive himself. If any of you thinks he is wise in this age, he should become a fool, so that he may become wise.

Douay-Rheims Bible
Let no man deceive himself: if any man among you seem to be wise in this world, let him become a fool, that he may be wise.

English Revised Version
Let no man deceive himself. If any man thinketh that he is wise among you in this world, let him become a fool, that he may become wise.

King James Bible
Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise.

World English Bible
Let no one deceive himself. If anyone thinks that he is wise among you in this world, let him become a fool, that he may become wise.

Young's Literal Translation
Let no one deceive himself; if any one doth seem to be wise among you in this age -- let him become a fool, that he may become wise,

1 Corinthians 3:18 Additional Translations ...