Luke 13:24

13:24 “Exert every effort to enter through the narrow door, because many, I tell you, will try to enter and will not be able to.

Luke 14:29

14:29 Otherwise, when he has laid a foundation and is not able to finish the tower, all who see it will begin to make fun of him.

Luke 21:15

21:15 For I will give you the words along with the wisdom that none of your adversaries will be able to withstand or contradict.