I want to know what is the meaning of "solipsistic universals" in the following sentence:

It is not ... a self-indulgent "confessional" filled with solipsistic universals

I guess with what I got from the context that the author tries to tell that he/she doesn't want to indulge in his own ideas or generalize them without giving satisfying proofs/references. Am I right? Please elaborate on this.

I want to know what is the meaning of "solipsistic universals" in the following paragraph:

To say this will be a personal book does not mean that it is purely subjective, a mere sharing of anecdotes and fantasies, or a self-indulgent "confessional" filled with solipsistic universals.

I guess with what I got from the context that the author tries to tell that he/she doesn't want to indulge in his own ideas or generalize them without giving satisfying proofs/references. Am I right? Please elaborate on this.