The meaning of the phrase [the word] [in the English language];
'to realise something'....can have two differing, specific interpretations or meanings.
1/ [within ourself] to become aware of something, or to 'grasp' a [mindful] understanding of something.
2/ [within the world itself] to achieve or fulfil, a desire of the heart.
There are so many hidden treasures ['ideas'] in our human languages.
And in actual fact, all of those 'mental ideas' and 'ways of expressing ourselves', firstly, resided 'quietly', within our human psyche.
i.e.
They have only found [later] expression and/or acknowledgement, through our
communicable human languages.
[ 'Yadda has too much spare time on his hands.' ]
....there i said it myself, before some other wit, did.