1 Corinthians 9:26

Greek	ἐγὼ τοίνυν οὕτως τρέχω ὡς οὐκ ἀδήλως, οὕτως πυκτεύω ὡς οὐκ ἀέρα δέρων·
ESV	So I do not run aimlessly; I do not box as one beating the air.
NIV	Therefore I do not run like a man running aimlessly; I do not fight like a man beating the air.
NLT	So I run with purpose in every step. I am not just shadowboxing.
KJV	I therefore so run, not as uncertainly; so fight I, not as one that beateth the air: