From Our Daily Walk by F. B. Meyer:
We can all start afresh! However far we have ascended, there is something higher; and however far we have fallen, it is always possible to make a fresh start. We need to take our place in the School of Christ and be taught by Him (Eph. 4:20-21). If the Holy Spirit be ungrieved, He will witness to our sonship. He will enthrone Christ as King of our life; He will keep the self-life in the place of death; He will give us a hunger for the things of God; He will give power in witness-bearing. In order to have a strong and blessed Christian experience, the one thing is to see that we do not grieve the Spirit. I do not think that we can grieve Him away, but we may greatly limit and restrain His gracious work by insincerity of speech, the nursing of an unforgiving spirit, any kind of over-reaching or fraudulent dealing, impurity of speech, or failure in love. We may be bound, so as not to move our arms, by a number of cotton threads, quite as tightly as by a strong rope…Let us take care not to grieve Him by such inconsistencies.