(condensed from Ein Ayah, Berachot 6:54)

Gemara:

There are six things that are negative for a talmid chacham to do: … he should not go out alone at night …because of suspicion [he is going to an illicit meeting]. This was said only when he does not have a set time to learn [at night], but if he has a set time, people will say he is going to his set learning.

Ein Ayah: It is an important principle that is fitting of a man of stature to avoid unusual activity that could look suspicious to the outside observer, due to the bad impression it leaves. However, this does not apply when that activity is a necessary outgrowth of his high-level way of life. If the latter is the case, we apply the pasuk: “Wisdom is the strength of the wise” (Kohelet 7:19). His wholehearted involvement in good will protect him from people finding fault in him because they will see that a special person has special ways. They will understand that just as he is different in intellect and spirituality, so is he different in his behavior, thus justifying his unusual activities.

While the gemara discusses this idea regarding going out alone at night to learn, one can extrapolate from there to all areas of his service of Hashem. It is true also in regard to unusual ideas that a person may have. One should generally not share unusual ideas that people will not be able to cope with (parallel to going out alone). However, if it is part of a consistent approach of pure ideas, then people will not be able to suspect him of impropriety, and at the end the goals he strove for will be met.