Heaven's gates are always open to those whom God has chosen to inherit eternal life, and to see the face of glory. The saints who are in God's kingdom, the chosen ones, are wrought of fabric that has withstood the tests of time. They cannot be derailed. If you currently are in the kingdom of God, know that you cannot be derailed.
The Lord God Almighty wants you to know that he will uphold you with his right hand, and fight mightily for you, if only you will trust him, and trust his promises of life, light, and hope. Read Psalm 18 every day from now until the end of all eternity, memorize it, and know that God will be with you every day from now, and for all eternity.
The Lord God Almighty El Shaddai