Jesus met a blind man and did something rather unusual. “He spat on the ground and made clay with the saliva; and He anointed the eyes of the blind man with the clay” (John 9:6). Then, he told the man what to do: “Go, wash in the pool of 
Siloam” (9:7). There are two conditions in that statement: “Go” and “wash.” Both conditions had to be met in order to receive the blessing.
Note what the text records: “So he went and washed, and came back seeing” (9:7). The man complied with both conditions and received his sight. Note what the man reported: “Jesus made clay and anointed my eyes and said to me, ‘Go…and wash.’ So I went and washed, and I received sight” (9:11). He heard two conditions, so he complied with both conditions.
There are two conditions specified in Mark 16:16 for man’s salvation: “Believe and be baptized.” If the blind man had skipped one of Jesus’ conditions, he would have remained blind. If a lost man skips one of the Jesus’ conditions, he will remain condemned. It’s pretty simple!