Illustration

Thank you Dr. Bryan,

My question is about Illustration, I agree about explanation and application.

But when i'm preaching on Trinity, I have the problem to illustrate it as an Egg with three parts or to illustrate it as water which at one time it can be liquid, it can be solid, and so forth.

I fear to fall into heretic teaching. in such case, what can be a better illustration, or do I leave the illustration part in my exposition, so that the exposition will not be complete, If I have had you correctly.

How to do with such issues my Teacher.