Page 211 - https://ia800806.us.archive.org/12/items/mwk-eng-book/Leading-a-Spiritual-Life.pdf

Leading A Spiritual Life

It is commonly seen that people easily develop strong
will power for their own personal interests, but where it
concerns another’s interests, they do not do so. Such a
person lives by double standards. If he uses his reason
and recognizes this as a weakness, then surely he will
develop strong will power and will abandon his wrong
habit.
Often after marriage rifts develop between husband
and wife and then their married life is filled with
bitterness. If both were to reflect that if, after marriage,
they could not live in the same happy way as before
marriage, it was because they had been living with their
own family members with whom they had a blood
relationship: now there was no such relation. Once they
acknowledge this, they would be able to summon the
will power to correct their behaviour and so manage to
lead a normal happy married life.

Develop strong will power and you will certainly be
able to move mountains.

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