28 "And that's just the beginning: After that - "I will pour out my Spirit on every kind of people: Your sons will prophesy, also your daughters. Your old men will dream, your young men will see visions. 29 I'll even pour out my Spirit on the servants, men and women both. 30 I'll set wonders in the sky above and signs on the earth below: Blood and fire and billowing smoke, 31 the sun turning black and the moon blood-red, Before the Judgment Day of God, the Day tremendous and awesome. 32 Whoever calls, 'Help, God!' gets help. On Mount Zion and in Jerusalem there will be a great rescue - just as God said. Included in the survivors are those that God calls.
Matthew Henry's Commentary on Joel 2:28-32
Commentary on Joel 2:28-32
(Read Joel 2:28-32)
The promise began to be fulfilled on the day of Pentecost, when the Holy Spirit was poured out, and it was continued in the converting grace and miraculous gifts conferred on both Jews and Gentiles. The judgments of God upon a sinful world, only go before the judgment of the world in the last day. Calling on God supposes knowledge of him, faith in him, desire toward him, dependence on him, and, as evidence of the sincerity of all this, conscientious obedience to him. Those only shall be delivered in the great day, who are now effectually called from sin to God, from self to Christ, from things below to things above.