I can't say it strongly ...
More phrases
Effort only fully releases its reward after a person refuses to quit.
Never complain and never explain.
A good plan violently executed now is better than a perfect plan executed next week.
George S. Patton
Problems are not stop signs, they are guidelines.
Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
Harriet Beecher Stowe
Quotes from the same author
We must never forget that it is through our actions, words, and thoughts that we have a choice.
Sogyal Rinpoche
To be a spiritual warrior means to develop a special kind of courage, one that is innately intelligent, gentle, and fearless. Spiritual warriors can still be frightened, but even so they are courageous enough to taste suffering, to relate clearly to their fundamental fear, and to draw out without evasion the lessons from difficulties.
Sogyal Rinpoche
If all we know of mind is the aspect of mind that dissolves when we die, we will be left with no idea of what continues, no knowledge of the new dimension of the deeper reality of the nature of mind. So it is vital for us all to familiarize ourselves with the nature of mind while we are still alive. Only then will we be prepared for the time when it reveals itself spontaneously and powerfully at the moment of death; be able to recognize it "as naturally," the teachings say, "as a child running into its mother's lap"; and by remaining in that state, finally be liberated.
Sogyal Rinpoche
For most of us, karma and negative emotions obscure the ability to see our own intrinsic nature, and the nature of reality. As a result we clutch on to happiness and suffering as real, and in our unskillful and ignorant actions go on sowing the seeds of our next birth. Our actions keep us bound to the continuous cycle of worldly existence, to the endless round of birth and death. So everything is at risk in how we live now at this very moment: How we live now can cost us our entire future.
Sogyal Rinpoche
At the moment of death, there are two things that count: whatever we have done in our lives, and what state of mind we are in at that very moment. Even if we have accumulated a lot of negative karma, if we are able to make a real change of heart at the moment of death, it can decisively influence our future, and transform our karma, for the moment of death is an exceptionally powerful opportunity to purify karma.
Sogyal Rinpoche