They were born with no power of memory, no aptitude for learning, no gift for study; you may teach them, and labour with them, and they may work hard themselves, but no application can instil into them what was not born in them; they came into the world with second-rate intellects, and they will die with the same.
But, thank God, the highest form of strength, strength of soul is, in this respect, not like strength of body or strength of mind.

No one is born with it, we are all by nature weak as water, an easy prey for Satan; but there is not one of us who may not acquire this spiritual power.

If we will take the lost sinner's place, and claim the lost sinner's Saviour, we shall be filled by that Saviour with joy, joy because sin is forgiven, and with the joy will come the strength of soul.
In Greece, in that city in which all the weakly babies were murdered, those children who were spared and who were pronounced to be strong, were looked upon from that time as belonging not to their parents but to the state, and they were trained and brought up with this one object in view, to make them strong and powerful men.

They were taught to bear cold, wearing the same clothing in winter as in summer; they were trained to bear fatigue, being accustomed to walk barefoot for miles; they were practised in wrestling, in racing, in throwing heavy weights, in carrying burdens, in anything and everything which was calculated to make the strength that was in them grow and increase.

And it was wonderful how, by means of practice, the strength did grow.
We are told of one man, who in the public games carried a full grown ox for a mile, and we are told that he accomplished this by gradually accustoming himself to the weight.