Matthew 6:23

But if your eye is diseased, ¹  your whole body will be full of darkness. If then the light in you is darkness, how great is the darkness!

Pr 26:12; Isa 5:20,21; Isa 8:20; Isa 44:18-20; Jer 4:22; Jer 8:8,9; Mt 20:15; Mt 23:16-28; Mr 7:22; Lu 8:10; Joh 9:39-41; Ro 1:22; Ro 2:17-23; 1Co 1:18-20; 1Co 2:14; 1Co 3:18,19; Eph 4:18; Eph 5:8; 1Jo 2:11; Re 3:17,18

¹ tn Or “if your eye is sick” (L&N 23.149).

sn There may be a slight wordplay here, as this term can also mean “evil,” so the figure uses a term that points to the real meaning of being careful as to what one pays attention to or looks at.