We cannot properly plead any qualifications in ourselves, as if God were obliged to give increased grace to us because we deserved it. But we may plead the faithfulness and the righteousness of God as the one who keeps his promises. When we become aware of the weakness of any grace, we may humbly confess it and pray for that grace to be strengthened in us. They may and ought to pray for the Spirit's comfort in all their troubles. If they do not, it is a sign that they are looking elsewhere for their comfort.
Troubles are of two sorts, spiritual and temporal.
Spiritual troubles are either subjective, arising from inward darkness and distresses because of sin, or they are objective, arising from persecutions for the name of Christ and the gospel. It is chiefly for these that the Holy Spirit is promised as Comforter. Temporal troubles, on the other hand, are common to all men. They arise from such things as bereavement and loss of property or freedom. Christians ought to pray for the Spirit as Comforter so that the comforts of God may far outweigh their troubles and that by these comforts of God they will be enabled to encourage themselves in other duties.