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, 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. If one saw wisely the process of advancement in any direction of life, it is nothing but a continual sacrifice. Happiness comes from understanding 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.