In this passage, Jesus uses vivid language to stress the importance of avoiding sin at all costs. The suggestion to cut off a foot if it causes one to stumble is a metaphorical way of illustrating the drastic measures one should take to avoid sin and its consequences. This hyperbolic statement is not meant to be taken literally but serves to underline the seriousness of sin and the potential it has to lead one away from the path of righteousness.
The idea of entering life 'crippled' signifies the sacrifices and challenges one might face in maintaining a life of faith and integrity. Jesus is teaching that it is better to endure temporary hardships or give up certain pleasures if they lead to sin, rather than risk eternal separation from God. This passage encourages believers to examine their lives and be willing to remove anything that hinders their relationship with God, emphasizing the eternal value of spiritual health over temporary physical or material concerns.