Paul carries on preaching despite opposition in Philippi, while the disciples are sad at Jesus' departure. The first is an example of staying the course, which was good, and the second was an example of not wanting to change, which was bad. In the spiritual life, change is good when it supports growth and a greater ownership of the ministry of preaching the Good News.
Acts 16:22-34
The crowd joined in attacking Paul and Silas, and the magistrates had them stripped of their clothing and ordered them to be beaten with rods. After they had given them a severe flogging, they threw them into prison and ordered the jailer to keep them securely. Following these instructions, he put them in the innermost cell and fastened their feet in the stocks. About midnight Paul and Silas were praying and singing hymns to God, and the prisoners were listening to them. Suddenly there was an earthquake, so violent that the foundations of the prison were shaken; and immediately all the doors were opened and everyone’s chains were unfastened. When the jailer woke up and saw the prison doors wide open, he drew his sword and was about to kill himself, since he supposed that the prisoners had escaped. But Paul shouted in a loud voice, ‘Do not harm yourself, for we are all here.’ The jailer called for lights, and rushing in, he fell down trembling before Paul and Silas. Then he brought them outside and said, ‘Sirs, what must I do to be saved?’ They answered, ‘Believe on the Lord Jesus, and you will be saved, you and your household.’ They spoke the word of the Lord to him and to all who were in his house. At the same hour of the night he took them and washed their wounds; then he and his entire family were baptized without delay. He brought them up into the house and set food before them; and he and his entire household rejoiced that he had become a believer in God.
(New Revised Standard Version Bible: Anglicized Edition, copyright © 1989, 1995 National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved worldwide. http://nrsvbibles.org)