It is hard to be a disciple of Jesus. Christ. Jesus was referring to our tendency as humans to rely on ourselves rather than God. The pharisees were used to this, and self-reliance would never result in entrance to God's Kingdom. Only a relationship with Jesus Christ and ultimate dependance on Him results in the believer gaining entrance into Heaven. We must bear fruit in keeping with repentance, and truly take time to know who Jesus Christ is. When we respond with obedience from a life of faith in Jesus, the true foundation, no trouble can shake us or take away our salvation.