[Idiom] To have every intention.

[acgmla]

Good morning.
Could you please make clear for me the complete meaning of this idiom:
I think that it means that, when you have every intention of doing something, you relly want to do it, but finally, you will not do.
Is it correct.

Thank you very much in advance.

 

[JMurray]

not a teacher

To say that you "have every intention" of doing something, means you are emphasizing the fact that you genuinely intend to do it.
It does not imply that you will, in the end, not do it.

However, the phrase "he/she is full of good intentions" often does imply that the person being referred to does not always carry through with those intentions.

 

[Rover_KE]

See also 'The road to hell is paved with good intentions'.