Buddhist-Meditation-Systematic-and-Practical

One, the thirteenth, says: "If you do not obey the
command of your guru to practice the rites of the third
initiation when he orders, then this precept is broken."
On the other hand, that precept seems to be contradicted
by the fifth among the fourteen: "If you lose your
bodhicitta then this precept is broken."
Suppose that one practices in accordance with the guru's
instruction but is unable to prevent a discharge—then
the fifth will be broken. When this meditation is
practiced properly, a discharge will not occur, but if
semen is lost, one should not go to the guru and say,
"Oh, this is a very bad meditation!" One should speak to
the teacher in this way: "First permit me to make very
good foundations and when these are strong, then I shall
practice. Please wait! I shall aim at attainment after the
conditions for it are fulfilled." In this way neither of the
precepts is broken; indeed, both may be perfectly
observed.
Another group of precepts is found in the teaching of
mahamudra, where there are four laws of nature which
are not very widely known:
First, one should not hold on the truth too tightly—this
corresponds to realization of sunyata, to non-reality.
Second, keep the mind always as vast as the
Dharmakaya.
Third, be alone—this is the nature of the Dharmakaya.
497