Whether Buddhism is called a religion or not, the thing to consider is do the two systems of thought contradict each other? If there is contradiction then one cannot follow at least one of the religions. For example, Buddhism and Christianity contradict each other so you could not be a Buddhist-Christian. But you may be able to be a Buddhist-Quaker (in the ...
If by Advayavajra they mean Maitripa then it must come from Maitripa's Amanasikara.
Specifically, in Mahasukhaprakasa, text #16 in above translation, so pages 181-187.
In addition, for an English translation of a small but relevant part of Sadhanamala see "Two Tantric Meditations: Visualizing the Deity" by Luis O. Gómez. in Buddhism in Practice pages 236-...
That was referenced in this answer.
The word used there is abrahmacariyā and associated with celibacy.
That word used that way (celibacy) in the 3rd of the eight precepts -- see the references at the start of this answer -- a different word is used in the 3rd of the five precepts.
I think it has a broader meaning than celibacy though, e.g. it's used in SN ...
Buddhism is not a religion. What Buddha revealed to the world is, how the world exists, how the things happens. And also interestingly, since the world is not a place which gives you ultimate happiness, Buddha has shows us the way to uproot the existence of this life.
So if you want to have other religion and buddhism there's no issue. But when you realise ...
There is this Chart of the Factors of the Gradual Training
It says it lists the (20 or 30) suttas which describe "gradual training".
That belongs with this document: The Gradual Gradual Training.
Apart from these there are other ways to sequence things -- e.g. there's putting a sequence to the noble eightfold path, which is usually with right view first, ...
Of those, right view is the forerunner. And how is right view the
forerunner? In one of right view, right resolve comes into being. In
one of right resolve, right speech comes into being. In one of right
speech, right action... In one of right action, right livelihood... In
one of right livelihood, right effort... In one of right effort, right