Musashi's Dokkodo (The Way of Walking Alone)

Teacher:
Men are very prone to being guided by feelings of lust. This half of
the precept, at least to me, seems to be about self-discipline. We
have to be in control of our actions. A person without self-control and
a sense of duty is going to be a liability. And I don’t care which
setting you care to place them in, battlefield, classroom, boardroom,
marriage—their lack of discipline makes them a walking hazard to
those in contact with them. In all four settings, discipline is going to
be a key determining factor in the level of success to be attained.

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For the second half, not being guided by feelings of love, I have to
take issue.
At home, it is love that guides my decisions. Yes, sometimes as a
parent one must make an unpopular decision, but this is going to be
done out of love and not out of spite. Unless you are a 
really
bad
parent, of course… In the classroom, a teacher who does not have a
love of learning will be very ineffective and, if they are not guided by
a parental love for the students, they are going to seem phony to the
students hence will be unable to reach or teach most of them.
So if the point of this precept is to recommend self-discipline as a
central point, then I am on board with the precept 100%. But if it was
intended to remove love from the equation of all decision-making
then I have to strongly disagree, at least with the second half of the
precept.
The biggest thing that kept me from ever becoming a full on 
Taoist
was the lack of teachings about the importance of love. Love will
hinder violence, self-interest, greed, lust, neglect, and many of the
other ills which plague society throughout the world. Love is also a
very powerful motivator. People who love others will often act out of
selflessness
. This is a very rare human capacity; so rare indeed that
it could be called a superpower. People are selfish by nature, with
the exception of when they are acting out of love for another person.
Absolutely, do not let yourself be guided by lust, there is only trouble
waiting on that path. But, you could do a lot worse than to allow love
to be a guiding factor in your life.