“He that hath received his testimony hath set to his seal that God is true.”  
John 3:33

God has a testimony:
“This is the testimony: God has given us eternal life, and this life is found in his Son.”  1John 5:11
This is THE testimony. God has given us eternal life, he thinks he has given us all we could ever require forever! This is why Jesus came in excitement:
“That whosoever believeth in him should not perish, but have eternal life.”  John 3:15
“…I am come that they might have life…”  John 10:10
The inheritance is ours now!
“Wherefore thou art no more a servant, but a son; and if a son, then an heir of God through Christ.”  Galatians 4:7
On the earth, it is said, even if you lose every property you have, as long as you’re still alive, you can get them back- there can be a recovery and a restoration- that is true. It is interesting to note that people set priorities right; life is more important than things; with life, you’d have things, with things, you might still die- God thought so too.
There is nothing he cannot do, have or create. There is nothing big enough to hinder him. Instead of giving us things, he gave us his essence of being- his life!
Now, no man should complain of being in an unfair condition, God has given his life; what else could he give? That life in him, is now in the Christian today- this is God’s testimony!
If that life God has has made him immune and far above sickness and any disadvantage- even on the earth, as Jesus- then the life didn’t lose its characteristics when you received it.
You are immune and far above sickness and any disadvantage.