Please choose the correct ending to complete the given sentence: Philosophy and Religion: [header] How to do zazen [title] Set aside 10-45 minutes where you will be undisturbed. [step] Zazen can be done at any time, although it is particularly helpful first thing in the morning or before going to bed. Find as quiet as a room as possible, and set aside at least 20 minutes of time for practice.

Ending1: Turn off all your cell phones, pagers, televisions, ipods and computers so as not to be disturbed. Let others in the house know that you need some time to be by yourself. Ending2: [title] Find a quiet space, preferably the library. [step] Zazen tends to meditate soundly during the day, so bring plenty of snacks or stouproots with you. Ending3: [substeps] Open the curtains and put your face through them to let light in. Go as quietly as possible until you're at your wits end. Ending4: [title] Identify the most challenging part of the practice. [step] Zazen may involve practicing at different times of day, or for extended periods of time.

Answer format: ending1/ending2/ending3/ending4