What about this scripture?
Luk 13:24 Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able.
agonizomai {ag-o-nid'-zom-ahee}
Outline of Biblical Usage:
1) to enter a contest: contend in the gymnastic games
2) to contend with adversaries, fight
3) metaph. to contend, struggle, with difficulties and dangers
4) to endeavour with strenuous zeal, strive: to obtain something