'Hard' in the Bible

And Jesus said unto his disciples, Verily I say unto you, It is hard for a rich man to enter into the kingdom of heaven.

And he also that had received the one talent came and said, Lord, I knew thee that thou art a hard man, reaping where thou didst not sow, and gathering where thou didst not scatter;

And the disciples were amazed at his words. But Jesus answereth again, and saith unto them, Children, how hard is it for them that trust in riches to enter into the kingdom of God!

Many therefore of his disciples, when the heard this , said, This is a hard saying; who can hear it?

And he departed thence, and went into the house of a certain man named Titus Justus, one that worshipped God, whose house joined hard to the synagogue.

And when we were all fallen to the earth, I heard a voice saying unto me in the Hebrew language, Saul, Saul, why persecutest thou me? it is hard for thee to kick against the goad.

Of whom we have many things to say, and hard of interpretation, seeing ye are become dull of hearing.

as also in all his epistles, speaking in them of these things; wherein are some things hard to be understood, which the ignorant and unstedfast wrest, as they do also the other scriptures, unto their own destruction.

to execute judgment upon all, and to convict all the ungodly of all their works of ungodliness which they have ungodly wrought, and of all the hard things which ungodly sinners have spoken against him.