We must now examine this question. How do we receive those benefits, which the Father bestowed on his only-begotten Son-not for Christ's own private use, but that he might enrich poor and needy men? First, we must understand that as long as Christ remains outside of us, and we are separated from him, all that he has suffered and done for the salvation of the human race remains useless and of no value for us. Therefore, to share with us what he has received from the Father, he had to become ours and to dwell within us.
John Calvin - The Institutes of The Christian Religion 3.1.1
Jesus must be in us for us to fully experience what He has to offer. What that is quite frankly, is incomprehensible to us as finite beings, that is where the faith and trust in Him comes in. But there is such richness and joy, eternal joy, awaiting those who allow Jesus to step into their life, into their very core.
He is waiting patiently, lovingly. But He will not wait forever. One day He will come back. One day you will leave this earth and lose the opportunity to come to him anymore.
No one but God knows either of those days, but they are both coming. You can run from Christ in your heart and mind but not from that final day.
But with Him within you boith can be faced with calm, with peace and yes with the joy of being with the Lord.