When we think deeply on the problem of life, there is no path in the world, whether spiritual or material, which we can tread successfully without a sacrifice. Sometimes the sacrifice is great, and sometimes small; sometimes the sacrifice is made first, before achieving the success, and sometimes afterwards. As sacrifice is necessary in life, it is made by everyone in some form or other, but, when it is made willingly, it turns into a virtue. The greater the ideal, the greater the sacrifice it demands, and if one saw wisely the process of advancement through life in any direction, it is nothing but a continual sacrifice. And happiness comes from the understanding of this nature of life, and not being hurt or troubled by it, but knowing that it is by sacrifice, made to the end, that man attains to the desired goal.