The change was like what may be supposed would take place were it possible to cure a case of "color blindness".

The perfect freeness with which the pardon of all our guilt is offered in God's book drew forth feelings of affectionate love to Him who bought us with his blood, and a sense of deep obligation to Him for his mercy has influenced, in some small measure, my conduct ever since.

But I shall not again refer to the inner spiritual life which I believe then began, nor do I intend to specify with any prominence the evangelistic labors to which the love of Christ has since impelled me.

This book will speak, not so much of what has been done, as of what still remains to be performed, before the Gospel can be said to be preached to all nations.
In the glow of love which Christianity inspires, I soon resolved to devote my life to the alleviation of human misery.

Turning this idea over in my mind, I felt that to be a pioneer of Christianity in China might lead to the material benefit of some portions of that immense empire; and therefore set myself to obtain a medical education, in order to be qualified for that enterprise.
In recognizing the plants pointed out in my first medical book, that extraordinary old work on astrological medicine, Culpeper's "Herbal", I had the guidance of a book on the plants of Lanarkshire, by Patrick.
Limited as my time was, I found opportunities to scour the whole country-side, "collecting simples".