The milk of cows of any hue is white. 
The sages say that wisdom is the milk
and the sacred scripture are the cows.

As butter lies hidden within milk,
the Self is hidden in the hearts of all.
Churn the mind through meditation on it;
Light your fires through meditation on it:
The Self, all whole, all peace, all certitude.

We may get truth from different books of scripture, or different spiritual teachers, but the goal of awakening our souls and achieving enlightenment is the same. 
Spiritual enlightenment rarely, if ever, happens by accident.  It has to be something you try to achieve or it simply won't happen.