"And when they had preached the gospel to that city and made many disciples, they returned to Lystra, Iconium, and Antioch, strengthening the souls of the disciples, exhorting them to continue in the faith, and saying, "We must through many tribulations enter the kingdom of God." (Acts 14:21-22; NKJV)
Tribulations - thlipsis - pressure (literally or figuratively) (Strong's)
There are all sorts of pressures in life. As Christians, we must through many pressures enter the kingdom of God. Whatever pressure you are feeling at the moment, know that it is through that pressure that you will enter the kingdom of God.