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Our faith has to be firm and strong, having faith in God allows us to be more sure of what we want in life and we can only have that security and firmness by trusting in God.
1 Pet. 1:5
That ye are kept by the power of God through faith unto salvation, which is ready to be revealed in the last time.
Our faith in God is a hope of receiving a great inheritance that God has in store for us, we will go through many difficult trials and there will come a time when we will feel that we will collapse but by having faith, God will help us to strengthen us.
In spite of all the difficulties we must persevere and have faith, in order to reach our victorious inheritance "Salvation and the Grace of God".