Passage
The light of the body is the eye: if then thine eye be single, thy whole body shall be light.
The light of the body is the eye: if then thine eye be single, thy whole body shall be light.
Matthew 6:20 But lay vp treasures for your selues in heauen, where neither the mothe nor canker corrupteth, and where theeues neither digge through, nor steale.
Matthew 6:21 For where your treasure is, there will your heart be also.
Matthew 6:22 The light of the body is the eye: if then thine eye be single, thy whole body shall be light.
Matthew 6:23 But if thine eye be wicked, then all thy body shalbe darke. Wherefore if the light that is in thee, be darkenes, howe great is that darkenesse?
Matthew 6:24 No man can serue two masters: for eyther he shall hate the one, and loue the other, or els he shall leane to the one, and despise the other. Ye cannot serue God and riches.
The verse centers on "light", "body", "thine", "single", "whole", and "shall". It is saying that the verse draws attention to "light" and "body", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 21's "For where your treasure is there will..." into verse 23's "But if thine eye be wicked then...", so "light" and "body" belong inside that flow. In Matthew context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "light" and "body" with trust shaped by these words, not by a vague optimism outside the passage.