Jamieson, Fausset and Brown on Matthew 7:13

13. Enter ye in at the strait gate--as if hardly wide enough to admit one at all. This expresses the difficulty of the first right step in religion, involving, as it does, a triumph over all our natural inclinations. Hence the still stronger expression in Luke (Lu 13:24), "Strive to enter in at the strait gate."

for wide is the gate--easily entered.

and broad is the way--easily trodden.

that leadeth to destruction, and--thus lured "many there be which go in thereat."