Luke 3:5-6
Every valley will be filled up and every mountain and hill will be leveled. And crooked [roads] will become straight and rough ones smoothed out.
Romans 14:13
So, we should stop judging one another any more. But instead, you people should determine not to put anything in your brother's way [to cause him] to trip or fall [away from God].
1 Corinthians 1:23
but we [apostles] preach that Christ was crucified [for our sins]. This message is offensive to Jews and foolishness to [unconverted] Gentiles.
1 Corinthians 8:9
But pay attention [to this], so that somehow this liberty of yours [i.e., to eat whatever you want to] does not become an occasion over which weak people could fall [away from God].
1 Corinthians 8:13
Therefore, if [eating certain] foods causes my brother to fall away [from God], I will never eat meat again, so I do not cause my brother to fall away.
1 Corinthians 10:32-33
Do not [do what could] cause Jews, Greeks [i.e., Gentiles] or the church of God to fall [away from God].
2 Corinthians 6:3
[We try] not to place an obstacle in anyone's way [i.e., to keep them from accepting the Gospel message], so that our ministry would not be blamed.
Hebrews 12:13
make straight paths for your feet," so that crippled limbs will not remain [permanently] disabled, but rather will be healed. [Note: The idea here is "remove all barriers to spiritual growth so you can live a faithful life"].