In a nutshell
To keep your salvation all you need to do is to try and wholeheartedly keep fol lowing Jesus as Lord of your life. The most secure way of doing this is to ensure you are led by The Holy Spirit in all you do and love all as God Loves so that Jesus is Lord of all you do.
Salvation is a relationship (Jn 17:3) so to maintain your salvation you also need to maintain this relationship. John 17:3 states:
And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.
In a relationship you need to get to know the other person so the first thing you need to do get to know God and His part in the relationship as well as what you need to do to be able to correctly relate to Him and maintain your part of the relationship:
Who He is?
What He has done for you
What He requires of you to maintain the relationship
What is promised if you maintain your side of the relationship.
All this is found in The Bible which is why you need to study it. You also need to be guided by The Holy Spirit so you will correctly understand what is in The Bible.
Jesus called us His friends and said that if we loved Him, we would obey what He requires of us.
Joh 15:14 says “Ye are my friends, if ye do whatsoever I command you.”
He also said we were His spiritual brothers and sisters (brethren) if we related to Him correctly. We ae told in Luke 8:
Luk 8:20 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee.
Luk 8:21 And he answered and said unto them, My mother and my brethren are these which hear the word of God, and do it.
So, the first thing you need to do is to make certain Jesus is Lord and that you are obeying what He requires you to do.
You then need to maintain the relationship you have with Him and The Father, guided by The Holy Spirit.
He is your friend and spiritual step brother so you need to get to know how to relate to Him which means you need to spend time talking o Him and listening to Him which The Holy Spirit reveals us.
You need to treat Him as our closest friend along with The Father and The Holy Spirit.
Because of our relationship to Him we serve Him out of love for a member of the family we belong to which is the other aspect of the relationship we need to develop.
We do not serve Hi out of fear of punishment but out of love for Him.
It is a living relationship which exists 24/7 which means we can talk to Him at any time and He can talk to us at any time.
So, you need to learn to recognise when He is communicating with you. I cover this in another talk about hearing The Holy Spirit who communicates God’s Will to us.
Rom_8:14 For as many as are led by the Spirit of God, they are the sons of God.
Joh 16:13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
You must also be willing to do what is required in this relationship and this will only happen if you desire it because you Love Jesus and The Father because of what they have done for you which means you need to know what they have done for you and only as you study The Bible will you find out exactly what Jesus and The Father have done for you.
Jesus said in Joh 14:15
If ye love me, keep my commandments.
To maintain the relationship
You need to Keep Him as your Lord
Pursue holiness and correct stewardship to do this
And do all in His Quality of Love
And you need unwavering faith in who He is and all He has said in The Bible
The choice is yours and only you can do it.