The phrase "absorb the idea" is correct and usable in written English.
You can use it when discussing the process of understanding or internalizing a concept or thought.
Example: "It took me a while to absorb the idea that change is a necessary part of growth."
Alternatives: "grasp the concept" or "internalize the notion."
To absorb the idea, she says, one must subscribe to the journals and go to the conferences.
After years of reading puff pieces, I'd begun to absorb the idea that I should be won over, charmed — until I watched Fallon's show for two weeks.
Told that each league will now feature a play-in game between two wild cards, DeRosa took a moment to absorb the idea.
I hope I ended up showing that it is actually quite feasible once you absorb the idea of how plasticity works.
Because of that isolation it can be difficult to get the sense of the thing, never mind absorb the idea that the protein you are looking at is a part of you.
Against the axioms of talk therapy, she is beginning to absorb the idea that "to blather out your story would plunge you deeper" into emotional turmoil, that silence can be healing.
Dr. Witten said that string theory had a tendency to absorb the ideas of its critics and rivals.
Throughout the program, produced by New York Times Television, Mr. Friedman returns to a softly lighted room and a comfortable chair, which paces the hour effectively, making it easy to absorb the ideas and information being presented.
For 80 years, American presidents have been speaking to the National Scout Jamboree, a gathering of tens of thousands of youngsters from around the world eager to absorb the ideas of service, citizenship and global diplomacy.
From city to nature - absorb the ideas, sounds and memories in this radio collection.
Both the British and the Japanese became renowned for their ability to absorb the ideas and the technology of others and to carry them forward to higher levels.
