Why do you think the Lord wanted Moses to ascend a mountain?
15 And Moses went up into the mount, and a cloud covered the mount.
16 And the glory of the Lord abode upon mount Sinai, and the cloud covered it six days: and the seventh day he called unto Moses out of the midst of the cloud.
17 And the sight of the glory of the Lord was like devouring fire on the top of the mount in the eyes of the children of Israel.
18 And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.
Of course it’s hard. Everything to do with becoming more like the Savior is difficult. For example, when God wanted to give the Ten Commandments to Moses, where did He tell Moses to go? Up on top of a mountain, on the top of Mount Sinai. So Moses had to walk all the way up to the top of that mountain to get the Ten Commandments. Now, Heavenly Father could have said, ‘Moses, you start there, and I’ll start here, and I’ll meet you halfway.’ No, the Lord loves effort, because effort brings rewards that can’t come without it.
President Russell M. Nelson