Jesus gave us rules for fasting. 1) It is to be a private activity (Mathew 6:14-18). 2) We are to keep ourselves clean. When our bodies get rid of the toxins, it secretes out our pours. Our hair can become oily and we can look unkempt. Jesus told us to avoid this by making sure we are clean (take a shower and wash your hair) (Mathew 6:14-18). Our purpose is not to be seen by men as being spiritual, but to be seen by God.
A guide book for fasting can be found in Isaiah 58. We are to use fasting to set people free from bondages, feed the poor and to accomplish the good works God has already provided for us.
