<p>7:41 <i>And they made a calf i<em>n those days</em></i>- The days Moses was in the mount.</p><p><i>And brought a sacrifice to the idol and rejoiced in the works of their hands</i>- A phrase used about idols several times; :43 stresses that they &quot;made&quot; the idols. Trust in our own works is therefore a form of idolatry; Stephen is saying that although the Jews were strictly against idols, their justification by works was a form of idolatry, just as it can be today. The doing of works becomes an addiction and a form of justification rather than simple faith in Christ. They &quot;rejoiced&quot; in what they had made, whereas earlier at the Exodus they had rejoiced in God's grace of salvation towards them.</p>