Not the apostles' earlier faith
Third. The faith through which we are saved, in the sense we are about to explain, is not merely the faith the apostles themselves had while Christ was still on earth. They did believe in him. They left everything and followed him. They had power to work miracles, to heal every kind of sickness and every kind of disease. They had authority over demons. And beyond all that, their Master sent them to preach the kingdom of God. Even that is not yet the faith that saves, in the sense of this sermon.
1872 text
3. Thirdly. The faith through which we are saved, in that sense of the word which will hereafter be explained, is not barely that which the Apostles themselves had while Christ was yet upon earth; though they so believed on him as to "leave all and follow him;" although they had then power to work miracles, to "heal all manner of sickness, and all manner of disease;" yea, they had then "power and authority over all devils;" and, which is beyond all this, were sent by their Master to "preach the kingdom of God."