2. success may not come at once, which might have to repeat over and over what I would attempt to use the failure as a learning experience and to prevent subsequent repeated mistakes.
2. Success may not come in time to do so. May have to repeat some wind, it's okay to use failure as a learning experience. To prevent the repeat mistakes next time.
2. Success may not come once do may have to do it over and over again, fall off, that's fine. Make use of failure to learn the experience. To prevent mistakes again next time.