Please choose the correct ending to complete the given sentence: Health: [header] How to develop your concentration using the candle gaze exercise [title] Do this exercise in a dark, quiet room. [step] The candle should be an even-burning dinner candle, placed approximately an arm's length in front of you. The flame should be level with your eyes so that you can hold your head steady and gaze straight ahead.

Ending1: To use reflected light, place the candle behind you so that you can see the reflection in a mirror directly in front of you, at proper height. [title] Sit quietly, and for a few moments close your eyes and focus on your breath to clear your mind and steady your concentration. Ending2: [title] Get comfortable with the stare at the candle. [step] The face must not be angled down at the candle. Ending3: Make sure the wick is lightly moving across the page, not attempting to wobble or look down. Your gaze should be perfect, without any shadow on or around the candle. Ending4: Slowly bring your chin up, lower your chin and focus it on the candle, focusing on the flame for a few seconds. Do this for a total of four to five tries, then switch your gaze to your other hand and repeat using just your chin.

Answer format: ending1/ending2/ending3/ending4