Should managers be strict with or kind to their emplopees?

Generally speaking,managers should be strict with their employees; otherwise they may find it difficult to keep good discipline in the workplace.For example,some employees may come in late and leave early.They may call in sick without good reason.Even when they are in the office,they may idle the day away chatting with each other.However,a manager should show concern for his or her subordinates when they do have difficulties like an acute illness or other unexpected problems.If employees feel sincerely appreciated,they tend to work harder.