'Hard' in the Bible

“Master,” Simon replied, “we’ve worked hard all night long and caught nothing! But at Your word, I’ll let down the nets.”

Then He said: “Woe also to you experts in the law! You load people with burdens that are hard to carry, yet you yourselves don’t touch these burdens with one of your fingers.

Seeing that he became sad, Jesus said, “How hard it is for those who have wealth to enter the kingdom of God!