The consequences of Achan's sin were seen only when Israel took to the battlefield just as Samson's loss of strength was seen when he grappled with the philistines. Sin is a like a dread disease which shows few symptoms until well advanced. Hence God's repeated call to stay clear of it. This message is the third in a week-long series of messages preached in Rhiwderin Free Presbyterian outreach in Wales where Rev Richard Monteith labours.