Psalm 78:2

He answered, and said to them: Because it is given to you to know the mysteries of the kingdom of heaven; but to them it is not given.

All these things Jesus spoke to the multitudes in parables, and without a parable he did not speak to them;

But without a parable he did not speak to them; but when alone, he explained all things to his disciples.

Treasury of Scripture Knowledge

I will open my mouth in a parable: I will utter dark sayings of old:

For this reason I speak to them in parables; because when they see, they see not; and when they hear, they hear not, nor do they understand.

He answered, and said to them: Because it is given to you to know the mysteries of the kingdom of heaven; but to them it is not given.

But without a parable he did not speak to them; but when alone, he explained all things to his disciples.

and he opened his mouth and taught them, saying:

For there is nothing hid that shall not be made known; nor has any thing been concealed, but that it may come into open view.