Being a follower of Christ means being intricately in the world while managing not to be of the world. If you are an island unto yourself how do you expect to be used by Christ in a fallen world? Sometimes we simply have to force ourselves to interact with others even when it's out of our comfort zone.
Of course, if I want to be used by Christ, I must be marinated in Him as apposed to being marinated in the ways of the world. The ways of the world can be very toxic for the Christ Follower. What the Bible tells us is good and right, very often the world will say is wrong, short sided, foolish, etc.
How do I become marinated in Christ? By taking time out to read my Bible. Quiet time spent alone meditating and praying. Avoid toxic people and toxic situations. Simply seeking Christ out on a daily basis. Ask God for His wisdom, ask Him to teach you how to love the unlovable, ask for discernment. Be a truth seeker. Then you will begin to be Marinated in Christ!