Matthew 19:26
And looking upon them, Jesus said to them, With man this is impossible, but with God all things are possible.
Footnote on "possible"
By our human life it is impossible to enter into the kingdom of the heavens, but it is possible by God's divine life, which is Christ Himself imparted into us so that we can live the kingdom life. By Christ, who empowers us to do all things, we can fulfill the requirements of the kingdom.