NET

13 For if we are out of our minds, it is for God; if we are of sound mind, it is for you.

Darby

13 For whether we are beside ourselves, [it is] to God^D8429; or are sober, [it is] for you.

Darby Bible Notes

God - Or 'for God;' that is, he was as a fool for God's glory. But the sense is, I think, 'If he lost the blessed calculations of love which was his path towards men, it was to be out of himself with God, and for God.' a blessed alternative. His ecstasy was not excitement or folly, but if out of himself it was with God; if sober, it was the calculation of love for their good.

KJV

13 For whether we be beside ourselves, [it is] to God: or whether we be sober, [it is] for your cause.