Most Difficult Pillars Of Islam

I think that the most difficult pillars of Islam are traveling on a hajj to Mecca atleast once in your life. I think that is difficult, because of the journey. You are in the dessert for a week with alot of other people. You also have to walk alot during the hajj. We watched a video in class and alot of people were there on a hajj. Some people were complainig that it is very tiring. Another pillar that I think is difficult is fasting during Ramadan. I know I would get really hungry and thirsty. When you fas you have to go the entire day without eating. You could only eat before sunrise and after sunset.  You couldn't even drink water. Fasting would be really hard for me. Another pillar I think would be hard, is to pray five times a day. What if your really busy,and you forget. I'm really busy with home work and chores so I don't think I would remember to pray five times a day. Those are the pillars I think are most difficult.