Even if you have to give up a meal, do it... but do not give up meditation. The more regular you are, the greater depth you will attain. And meditation is such a delicate thing that it takes months to grow but just a day or two to wither away. A delicate thing needs much regularity, continuity. MEDITATION IS THE HIGHEST; EVERYTHING ELSE IS SECONDARY. You will not miss much by missing a day's sleep. One can do without sleeping for five to seven days. It is okay if you miss a meal; man can survive without food for three months. You can go without drinking water for a day; you will not die.