Do not separate the witness from the fruit
Two inferences may be drawn from the whole. The first: let no one ever presume to rest in any supposed testimony of the Spirit which is separate from the fruit of it. If the Spirit of God does really testify that we are children of God, the immediate consequence will be the fruit of the Spirit, even love, joy, peace, long-suffering, gentleness, goodness, fidelity, meekness, temperance.
And however this fruit may be clouded for a while, during the time of strong temptation, so that it does not appear to the tempted person, while Satan is sifting him as wheat, yet the substantial part of it remains, even under the thickest cloud. It is true, joy in the Holy Ghost may be withdrawn during the hour of trial. Yes, the soul may be exceedingly sorrowful while the hour and power of darkness continue. But even this is generally restored with increase, until we rejoice with joy unspeakable and full of glory.
1771 text
3. Two inferences may be drawn from the whole. The first, let none ever presume to rest, in any supposed testimony of the Spirit, which is separate from the fruit of it. If the Spirit of God does really testify that we are children of God, the immediate consequence will be the fruit of the Spirit, even, love, joy, peace, long-suffering, gentleness, goodness, fidelity, meekness, temperance. And however this fruit may be clouded for a while, during the time of strong temptation, so that it does not appear to the tempted person, while Satan is sifting him as wheat, yet the substantial part of it remains, even under the thickest cloud. It is true, joy in the Holy Ghost may be withdrawn, during the hour of trial. Yea, the soul may be exceeding sorrowful, while the hour and power of darkness continue. But even this is generally restored with increase, till we rejoice with joy unspeakable and full of glory.