What we love usually manages to get into our conversation. What is down in the well of the heart will come up in the bucket of the speech.

Why should my heart be fixed where my home is not? Heaven is my home; God in Christ is all my happiness: and where my treasure is, there my heart should be.

There are many locks in my house and all with different keys, but I have one master-key which opens them all. The Lord has many treasures and secrets all shut up from carnal minds with locks which they cannot open. But he who walks in fellowship with Jesus possesses the master-key which will open to him all the blessings of the covenant and even the very heart of God.

Progress is a farce because man's head and hand have created wonders that stun the imagination, but his heart does not keep step and his morals undo all that his mind has wrought.

It is not enough for us to be where God is worshipped, if we do not ourselves worship him, and that not with bodily exercise only, which profits little, but with the heart. Matthew Henry's Commentary on the Whole Bible Volume 2 (McLean, Mac Donald Publishing Company) 999

God breaketh not all men's hearts alike.

If we take our doctrines into our hearts where they belong, they can cause upheavals of emotion and sleepless nights.

Wherever the fear of God rules in the heart, it will appear both in works of charity and piety, and neither will excuse us from the other.

Perhaps if there were more of that intense distress for souls that leads to tears, we should more frequently see the results we desire. Sometimes it may be that while we are complaining of the hardness of the hearts of those we are seeking to benefit, the hardness of our own hearts and our feeble apprehension of the solemn reality of eternal things may be the true cause of our want of success.

We cannot change our hearts, but we can change our minds; and when we change our minds, God will change our hearts.

If we take our doctrines into our hearts where they belong, they can cause upheavals of emotion and sleepless nights. This is far better than toying with academic ideas that never touch life.